1928439122 has 8 divisors (see below), whose sum is σ = 2894715900. Its totient is φ = 963533824.

The previous prime is 1928439089. The next prime is 1928439127. The reversal of 1928439122 is 2219348291.

It can be written as a sum of positive squares in 2 ways, for example, as 1926419881 + 2019241 = 43891^2 + 1421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1928439122.

It is not an unprimeable number, because it can be changed into a prime (1928439127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339347 + ... + 344982.

Almost surely, 2^1928439122 is an apocalyptic number.

1928439122 is a deficient number, since it is larger than the sum of its proper divisors (966276778).

1928439122 is a wasteful number, since it uses less digits than its factorization.

1928439122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685740.

The product of its digits is 62208, while the sum is 41.

The square root of 1928439122 is about 43913.9968802659. The cubic root of 1928439122 is about 1244.7113349345.

The spelling of 1928439122 in words is "one billion, nine hundred twenty-eight million, four hundred thirty-nine thousand, one hundred twenty-two".